Precipitation annual maximum series (inches) Station ID: 02-1314 Station name: CASA GRANDE NATL MONUMENT State: AZ Latitude (decimal degrees): 32.9947 Longitude (decimal degrees): 111.5367 Elevation (feet): 1419 Duration: 01d 5.40 1906 -9.99 1907 -9.99 1908 1.20 1909 1.17 1910 1.33 1911 1.41 1912 1.36 1913 1.41 1914 1.88 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.10 1932 1.50 1933 0.98 1934 0.93 1935 2.00 1936 1.41 1937 0.81 1938 0.55 1939 1.25 1940 2.21 1941 1.06 1942 0.83 1943 1.51 1944 1.12 1945 2.92 1946 0.86 1947 0.64 1948 1.23 1949 1.90 1950 1.87 1951 1.40 1952 0.81 1953 1.72 1954 1.82 1955 0.94 1956 1.40 1957 1.13 1958 1.51 1959 0.85 1960 0.94 1961 1.15 1962 1.60 1963 1.20 1964 1.45 1965 1.14 1966 1.85 1967 1.41 1968 1.02 1969 1.18 1970 1.55 1971 3.20 1972 0.98 1973 0.69 1974 0.84 1975 1.23 1976 1.70 1977 1.95 1978 1.25 1979 0.66 1980 0.88 1981 1.57 1982 1.79 1983 1.35 1984 2.03 1985 0.54 1986 1.17 1987 1.21 1988 0.79 1989 1.63 1990 0.78 1991 1.30 1992 1.76 1993 1.18 1994 2.12 1995 1.65 1996 1.21 1997 1.14 1998 2.02 1999 1.14 2000 Duration: 01h 10/18/1948 0.28 06/17/1949 0.25 08/05/1950 0.68 07/27/1951 0.50 11/09/1952 0.56 07/16/1953 0.50 09/01/1954 1.30 08/19/1955 1.18 07/29/1956 0.87 07/26/1957 0.61 10/05/1958 0.73 08/02/1959 0.69 02/10/1960 0.24 07/22/1961 0.78 09/22/1962 0.17 08/21/1963 0.94 07/30/1964 0.77 12/09/1965 0.48 09/13/1966 0.70 07/22/1967 0.60 03/09/1968 0.30 09/04/1969 0.40 08/05/1970 0.40 09/30/1971 0.50 08/04/1972 0.90 07/09/1973 0.90 07/14/1974 0.40 12/21/1975 0.30 08/28/1976 1.10 08/09/1977 1.50 03/22/1978 0.50 06/04/1979 0.60 01/31/1980 0.90 08/10/1981 0.30 07/30/1982 1.00 09/29/1983 0.80 09/10/1984 0.80 09/18/1985 0.60 02/16/1986 0.30 01/05/1987 0.20 10/20/1988 0.40 07/27/1989 0.60 08/14/1990 0.70 01/05/1991 0.20 08/22/1992 0.70 08/29/1993 1.10 11/12/1994 0.50 08/19/1995 1.20 07/14/1996 0.80 01/06/1997 0.10 -9/-9/-999 -9.99 -9/-9/-999 -9.99 -9/-9/-999 -9.99 Duration: 02d 5.40 1906 -9.99 1907 -9.99 1908 1.22 1909 1.60 1910 1.33 1911 2.19 1912 1.64 1913 1.76 1914 1.88 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.31 1932 1.67 1933 1.22 1934 1.33 1935 2.00 1936 1.41 1937 0.83 1938 0.56 1939 2.15 1940 2.21 1941 1.06 1942 1.41 1943 1.58 1944 1.13 1945 3.72 1946 0.97 1947 0.78 1948 1.30 1949 1.90 1950 2.04 1951 1.83 1952 0.81 1953 2.13 1954 1.82 1955 0.94 1956 1.40 1957 1.13 1958 1.59 1959 1.09 1960 1.06 1961 1.15 1962 1.97 1963 1.44 1964 2.51 1965 2.08 1966 2.75 1967 1.67 1968 1.02 1969 1.65 1970 1.55 1971 3.69 1972 1.02 1973 1.01 1974 1.36 1975 1.23 1976 1.70 1977 2.31 1978 1.80 1979 0.71 1980 0.95 1981 1.85 1982 2.09 1983 1.62 1984 2.03 1985 0.73 1986 1.47 1987 1.21 1988 1.00 1989 2.26 1990 0.98 1991 1.47 1992 1.78 1993 1.22 1994 2.40 1995 1.65 1996 1.21 1997 1.15 1998 2.02 1999 1.89 2000 Duration: 02h 10/18/1948 0.28 07/23/1949 0.40 08/05/1950 1.18 07/27/1951 0.65 11/16/1952 0.75 07/16/1953 0.69 09/01/1954 1.41 08/19/1955 1.46 07/29/1956 0.90 10/31/1957 0.90 10/05/1958 0.90 08/02/1959 0.82 02/10/1960 0.35 07/22/1961 0.86 01/21/1962 0.22 08/21/1963 1.20 07/30/1964 0.80 12/09/1965 0.65 09/13/1966 0.74 07/22/1967 0.60 03/09/1968 0.50 09/04/1969 0.40 03/02/1970 0.40 09/30/1971 0.50 08/04/1972 0.90 07/09/1973 1.00 10/28/1974 0.50 12/21/1975 0.40 08/28/1976 1.10 08/09/1977 1.70 03/01/1978 0.50 03/28/1979 0.70 01/31/1980 0.90 01/11/1981 0.30 07/30/1982 1.20 09/29/1983 0.90 10/03/1984 1.00 09/18/1985 1.10 08/29/1986 0.40 01/05/1987 0.30 10/14/1988 0.50 07/27/1989 0.70 08/14/1990 1.10 03/01/1991 0.30 07/24/1992 1.00 08/29/1993 1.10 11/12/1994 0.80 08/19/1995 1.20 07/14/1996 1.30 01/06/1997 0.20 -9/-9/-999 -9.99 09/19/1999 2.00 -9/-9/-999 -9.99 Duration: 03h 12/22/1948 0.31 07/23/1949 0.60 08/05/1950 1.40 01/30/1951 0.65 11/16/1952 0.94 07/16/1953 0.74 09/01/1954 1.45 08/19/1955 1.62 07/29/1956 0.91 10/31/1957 1.25 10/05/1958 0.90 08/02/1959 0.84 02/10/1960 0.44 07/22/1961 0.99 01/21/1962 0.31 08/21/1963 1.25 07/30/1964 0.85 12/09/1965 0.91 09/13/1966 0.82 07/22/1967 0.60 03/09/1968 0.70 09/04/1969 0.40 03/02/1970 0.50 09/30/1971 0.50 10/19/1972 1.20 07/09/1973 1.00 07/14/1974 0.60 11/28/1975 0.50 08/28/1976 1.10 08/09/1977 1.70 12/18/1978 0.70 03/28/1979 1.00 01/31/1980 0.90 01/11/1981 0.30 09/11/1982 1.60 09/29/1983 0.90 10/03/1984 1.00 09/18/1985 1.40 08/29/1986 0.40 12/17/1987 0.40 10/14/1988 0.70 07/27/1989 0.80 08/14/1990 1.40 10/27/1991 0.50 07/24/1992 1.10 08/29/1993 1.10 11/12/1994 0.90 08/19/1995 1.20 07/14/1996 1.40 01/06/1997 0.20 -9/-9/-999 -9.99 09/19/1999 2.00 -9/-9/-999 -9.99 Duration: 04d 5.46 1906 -9.99 1907 -9.99 1908 1.22 1909 1.68 1910 1.86 1911 2.24 1912 2.23 1913 2.83 1914 2.07 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.59 1932 1.82 1933 1.22 1934 1.48 1935 2.00 1936 1.41 1937 0.83 1938 0.56 1939 2.39 1940 2.21 1941 1.23 1942 1.75 1943 1.58 1944 1.65 1945 3.98 1946 1.05 1947 1.13 1948 1.39 1949 1.90 1950 2.28 1951 1.83 1952 0.81 1953 2.44 1954 1.98 1955 0.94 1956 1.96 1957 1.13 1958 1.97 1959 1.57 1960 1.07 1961 1.15 1962 2.02 1963 1.44 1964 2.93 1965 2.20 1966 3.31 1967 1.72 1968 1.30 1969 2.04 1970 2.40 1971 3.93 1972 1.02 1973 1.03 1974 1.36 1975 1.23 1976 1.97 1977 2.63 1978 1.80 1979 1.08 1980 0.95 1981 1.97 1982 3.70 1983 1.74 1984 2.03 1985 0.93 1986 1.74 1987 1.21 1988 1.08 1989 2.55 1990 1.00 1991 1.60 1992 2.81 1993 1.56 1994 2.41 1995 1.65 1996 1.32 1997 1.32 1998 2.43 1999 2.00 2000 Duration: 06h 12/22/1948 0.58 07/23/1949 1.21 08/05/1950 1.84 01/30/1951 1.20 11/16/1952 1.23 07/16/1953 0.79 09/01/1954 1.51 08/19/1955 1.75 07/29/1956 0.97 10/31/1957 1.36 10/05/1958 0.90 08/02/1959 0.89 02/10/1960 0.47 07/22/1961 0.99 01/21/1962 0.45 08/21/1963 1.28 08/12/1964 1.03 12/09/1965 1.15 09/13/1966 0.87 03/29/1967 0.80 03/09/1968 1.10 02/22/1969 0.40 03/02/1970 0.60 09/30/1971 0.50 10/19/1972 1.90 07/09/1973 1.00 10/28/1974 0.70 11/28/1975 0.70 08/28/1976 1.20 08/09/1977 1.70 12/18/1978 1.20 03/28/1979 1.20 01/31/1980 0.90 01/11/1981 0.60 09/11/1982 1.70 10/01/1983 1.50 10/03/1984 1.00 09/18/1985 2.00 01/31/1986 0.50 12/17/1987 0.60 10/14/1988 1.00 01/04/1989 0.90 08/14/1990 2.10 01/05/1991 0.50 07/24/1992 1.20 03/26/1993 1.30 11/12/1994 1.00 08/19/1995 1.40 07/14/1996 1.50 01/06/1997 0.30 -9/-9/-999 -9.99 09/19/1999 2.00 -9/-9/-999 -9.99 Duration: 07d 6.13 1906 -9.99 1907 -9.99 1908 1.30 1909 1.68 1910 1.87 1911 3.25 1912 2.55 1913 4.05 1914 3.15 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.67 1932 1.87 1933 1.22 1934 1.52 1935 2.25 1936 1.87 1937 1.45 1938 0.70 1939 2.39 1940 2.49 1941 1.23 1942 1.75 1943 1.58 1944 1.70 1945 4.12 1946 1.25 1947 1.39 1948 1.39 1949 2.42 1950 2.28 1951 1.83 1952 1.03 1953 2.44 1954 3.23 1955 0.97 1956 1.96 1957 1.34 1958 1.97 1959 1.82 1960 1.43 1961 1.25 1962 2.02 1963 1.70 1964 3.61 1965 2.20 1966 4.04 1967 1.72 1968 1.30 1969 2.08 1970 2.66 1971 3.93 1972 1.15 1973 1.10 1974 1.36 1975 1.34 1976 2.53 1977 2.63 1978 1.80 1979 1.49 1980 0.95 1981 2.07 1982 3.76 1983 2.07 1984 2.03 1985 1.04 1986 1.74 1987 1.94 1988 1.08 1989 2.65 1990 1.04 1991 2.26 1992 2.89 1993 1.59 1994 2.42 1995 2.90 1996 1.71 1997 1.86 1998 2.48 1999 2.00 2000 Duration: 10d 6.19 1906 -9.99 1907 -9.99 1908 1.30 1909 1.68 1910 1.87 1911 3.57 1912 2.75 1913 4.54 1914 3.15 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.76 1932 1.90 1933 1.46 1934 1.53 1935 2.70 1936 1.87 1937 1.50 1938 0.84 1939 2.75 1940 2.49 1941 1.23 1942 1.75 1943 1.58 1944 1.85 1945 4.12 1946 1.25 1947 1.39 1948 1.52 1949 2.42 1950 2.28 1951 2.70 1952 1.28 1953 2.64 1954 3.61 1955 0.97 1956 2.02 1957 1.60 1958 2.20 1959 1.82 1960 1.97 1961 1.25 1962 2.02 1963 1.70 1964 4.02 1965 2.20 1966 4.50 1967 1.74 1968 1.30 1969 2.25 1970 2.70 1971 4.17 1972 1.39 1973 1.69 1974 1.36 1975 1.44 1976 2.53 1977 2.63 1978 2.39 1979 1.83 1980 1.14 1981 2.27 1982 3.82 1983 2.24 1984 2.06 1985 1.08 1986 1.74 1987 1.94 1988 1.08 1989 2.65 1990 1.86 1991 2.26 1992 3.26 1993 1.22 1994 2.62 1995 2.90 1996 1.72 1997 2.40 1998 2.79 1999 2.19 2000 Duration: 12h 12/22/1948 0.75 07/23/1949 1.21 08/05/1950 1.84 01/30/1951 1.56 11/16/1952 1.36 07/16/1953 0.79 09/01/1954 1.60 08/19/1955 1.76 07/29/1956 0.97 10/31/1957 1.36 10/05/1958 0.99 10/29/1959 1.40 01/11/1960 0.69 07/22/1961 0.99 01/21/1962 0.50 08/21/1963 1.28 10/16/1964 1.15 12/09/1965 1.45 09/13/1966 1.09 12/14/1967 1.50 11/13/1968 1.20 01/14/1969 0.60 03/02/1970 0.80 09/30/1971 0.90 10/19/1972 2.30 07/09/1973 1.00 10/28/1974 0.70 11/28/1975 1.10 08/28/1976 1.20 08/09/1977 1.70 12/18/1978 1.60 03/28/1979 1.20 01/31/1980 0.90 11/28/1981 0.80 09/11/1982 1.70 10/01/1983 1.80 12/27/1984 1.30 09/18/1985 2.00 01/31/1986 0.50 12/17/1987 0.60 04/15/1988 1.00 01/04/1989 0.90 08/14/1990 2.20 03/27/1991 0.60 07/24/1992 1.20 03/26/1993 1.40 11/12/1994 1.10 01/04/1995 1.70 07/14/1996 1.50 01/06/1997 0.30 -9/-9/-999 -9.99 -9/-9/-999 -9.99 -9/-9/-999 -9.99 Duration: 20d 6.54 1906 -9.99 1907 -9.99 1908 1.77 1909 2.11 1910 2.22 1911 4.52 1912 2.92 1913 4.70 1914 3.72 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 1.91 1932 1.90 1933 2.15 1934 1.53 1935 3.86 1936 2.45 1937 1.53 1938 1.06 1939 4.32 1940 3.74 1941 1.57 1942 1.82 1943 1.94 1944 2.59 1945 4.48 1946 2.00 1947 1.61 1948 1.58 1949 2.55 1950 2.61 1951 3.56 1952 1.66 1953 2.64 1954 4.08 1955 1.35 1956 3.65 1957 1.88 1958 3.29 1959 0.73 1960 2.62 1961 1.25 1962 2.16 1963 2.82 1964 5.30 1965 2.23 1966 4.50 1967 2.17 1968 2.17 1969 2.33 1970 4.42 1971 5.05 1972 1.90 1973 1.74 1974 1.54 1975 1.91 1976 3.06 1977 3.66 1978 2.70 1979 2.21 1980 1.24 1981 2.95 1982 4.22 1983 3.03 1984 2.46 1985 1.45 1986 1.78 1987 1.94 1988 1.15 1989 3.49 1990 2.00 1991 2.41 1992 4.65 1993 1.34 1994 4.02 1995 3.70 1996 2.07 1997 3.67 1998 2.87 1999 2.99 2000 Duration: 24h 12/22/1948 0.78 07/23/1949 1.21 08/05/1950 1.84 01/29/1951 1.73 11/15/1952 1.38 07/16/1953 0.79 03/22/1954 1.77 08/19/1955 1.76 07/29/1956 0.97 10/31/1957 1.61 10/04/1958 1.10 10/29/1959 1.47 01/10/1960 1.04 07/22/1961 0.99 01/21/1962 0.50 02/10/1963 1.68 10/16/1964 1.40 12/09/1965 2.06 09/12/1966 1.57 12/14/1967 2.00 11/13/1968 1.40 01/14/1969 0.70 03/01/1970 1.40 09/29/1971 1.10 10/18/1972 3.20 07/09/1973 1.00 10/28/1974 0.70 11/28/1975 1.30 08/28/1976 1.20 08/09/1977 1.80 12/17/1978 2.00 03/28/1979 1.80 01/31/1980 0.90 01/11/1981 0.90 09/10/1982 1.80 10/01/1983 2.10 12/27/1984 1.40 09/18/1985 2.00 01/31/1986 0.50 12/17/1987 0.90 04/15/1988 1.10 01/04/1989 0.90 08/14/1990 2.20 03/27/1991 0.70 08/22/1992 1.30 03/26/1993 1.60 11/12/1994 1.10 01/04/1995 1.90 07/14/1996 1.60 01/06/1997 0.30 -9/-9/-999 -9.99 -9/-9/-999 -9.99 -9/-9/-999 -9.99 Duration: 30d 6.62 1906 -9.99 1907 -9.99 1908 2.53 1909 2.12 1910 3.23 1911 4.58 1912 3.03 1913 5.48 1914 3.92 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 2.51 1932 2.00 1933 2.46 1934 2.48 1935 3.96 1936 2.90 1937 2.08 1938 1.14 1939 4.52 1940 4.02 1941 2.03 1942 2.01 1943 2.31 1944 2.85 1945 4.48 1946 2.01 1947 1.90 1948 1.58 1949 3.46 1950 2.62 1951 3.91 1952 1.98 1953 3.00 1954 5.10 1955 1.80 1956 3.67 1957 2.34 1958 4.02 1959 0.86 1960 3.04 1961 1.44 1962 2.32 1963 3.19 1964 5.61 1965 2.54 1966 5.53 1967 2.32 1968 2.17 1969 2.57 1970 5.71 1971 5.61 1972 2.67 1973 2.19 1974 2.21 1975 2.91 1976 3.26 1977 4.61 1978 2.70 1979 2.75 1980 1.71 1981 3.62 1982 4.42 1983 3.79 1984 3.44 1985 1.45 1986 2.14 1987 1.94 1988 1.15 1989 3.76 1990 2.73 1991 3.20 1992 4.97 1993 2.27 1994 4.17 1995 3.70 1996 2.49 1997 3.99 1998 3.61 1999 3.13 2000 Duration: 45d 7.03 1906 -9.99 1907 -9.99 1908 2.91 1909 2.25 1910 3.29 1911 5.78 1912 3.08 1913 6.56 1914 5.15 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 3.26 1932 2.64 1933 1.94 1934 3.22 1935 4.21 1936 2.90 1937 2.51 1938 1.57 1939 2.33 1940 5.42 1941 2.05 1942 2.14 1943 2.61 1944 3.17 1945 5.51 1946 2.02 1947 1.48 1948 3.00 1949 3.62 1950 3.37 1951 4.54 1952 2.08 1953 3.06 1954 6.59 1955 1.80 1956 3.67 1957 2.91 1958 5.08 1959 0.86 1960 3.69 1961 1.54 1962 3.26 1963 3.71 1964 5.98 1965 2.60 1966 5.53 1967 3.15 1968 2.28 1969 2.57 1970 6.10 1971 6.97 1972 3.48 1973 2.26 1974 2.21 1975 3.07 1976 3.40 1977 6.43 1978 2.74 1979 3.54 1980 1.94 1981 5.70 1982 4.47 1983 4.45 1984 3.47 1985 2.21 1986 2.24 1987 2.36 1988 1.24 1989 4.87 1990 3.46 1991 4.48 1992 7.14 1993 5.22 1994 3.25 1995 4.68 1996 2.80 1997 4.43 1998 3.64 1999 3.24 2000 Duration: 48h 12/22/1948 0.86 07/22/1949 1.32 08/05/1950 1.84 01/29/1951 1.73 11/15/1952 1.76 07/16/1953 0.79 03/21/1954 2.10 08/19/1955 1.96 07/29/1956 0.97 10/31/1957 1.61 10/04/1958 1.10 12/24/1959 1.80 01/11/1960 1.06 12/14/1961 1.08 01/21/1962 0.70 02/10/1963 1.86 10/15/1964 1.45 12/09/1965 2.68 09/12/1966 2.02 12/13/1967 3.00 11/13/1968 1.70 01/14/1969 0.70 03/01/1970 1.60 09/29/1971 1.50 10/18/1972 3.70 02/21/1973 1.00 10/28/1974 1.00 11/28/1975 1.30 08/28/1976 1.20 08/09/1977 1.80 12/17/1978 2.50 03/28/1979 1.80 02/15/1980 1.00 01/11/1981 0.90 09/10/1982 2.00 09/29/1983 2.20 12/27/1984 1.70 09/18/1985 2.00 12/06/1986 0.90 12/17/1987 0.90 04/15/1988 1.10 07/27/1989 1.00 08/14/1990 2.30 03/26/1991 0.90 08/22/1992 1.70 11/12/1993 1.70 02/07/1994 1.10 08/19/1995 2.20 07/14/1996 1.60 01/06/1997 0.30 -9/-9/-999 -9.99 -9/-9/-999 -9.99 -9/-9/-999 -9.99 Duration: 60d -9.99 1906 -9.99 1907 -9.99 1908 3.24 1909 2.46 1910 3.85 1911 5.93 1912 3.08 1913 8.49 1914 5.72 1915 -9.99 1916 -9.99 1917 -9.99 1918 -9.99 1919 -9.99 1920 -9.99 1921 -9.99 1922 -9.99 1923 -9.99 1924 -9.99 1925 -9.99 1926 -9.99 1927 -9.99 1928 -9.99 1929 -9.99 1930 -9.99 1931 3.22 1932 3.91 1933 4.15 1934 1.47 1935 4.28 1936 3.32 1937 2.99 1938 1.82 1939 6.46 1940 5.72 1941 2.66 1942 3.01 1943 2.95 1944 3.17 1945 6.43 1946 2.74 1947 1.48 1948 3.28 1949 3.65 1950 3.37 1951 4.71 1952 2.52 1953 3.69 1954 6.62 1955 1.81 1956 3.99 1957 3.46 1958 5.18 1959 0.89 1960 3.98 1961 1.56 1962 3.78 1963 4.07 1964 6.48 1965 3.03 1966 5.53 1967 3.15 1968 2.67 1969 2.61 1970 7.26 1971 6.97 1972 3.77 1973 2.51 1974 2.87 1975 3.24 1976 3.68 1977 6.88 1978 2.79 1979 3.99 1980 2.65 1981 5.96 1982 6.16 1983 5.06 1984 4.10 1985 2.38 1986 2.62 1987 2.36 1988 1.25 1989 5.02 1990 3.58 1991 5.87 1992 7.38 1993 6.29 1994 3.42 1995 5.76 1996 3.13 1997 6.16 1998 4.39 1999 3.24 2000